Liquid atomizer



111201 26,; 1950 s. GIMELL! 5 3 LIQUID ATOMIZER Filed March 25. 1947 IN V EN TOR.

Patented Sept. 2 6 1950 s PATENT OFFICE LIQUID ATOMIZER Samuel Gimelli, Berne, Switzerland Application March 25, 1947, Serial-No. 737,027 In Switzerland July l9, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires July 19, 1963 r The liquid atomisers known in practice consist, as a rule, of an atomiser head and a compressed air member. In the former the liquid to be atomised is sucked according to the injector principle, mixed with the compressed air, and then ejected from the atomiser in the form of a vapour. The compressed air member usually comprises a rubber ball or an air pump which consists of a movable piston in a cylinder, the piston being restored to initial position by means of a compressed spring. The air pressure member is connected by means of a fiexible or a rigid tube with the atomiser head.

The present invention consists in an atomiser head or body for atomising liquids adapted to be applied to a liquid container having a pistonsleeve sliding in a bore of said head in opposition to a spring, characterised in that in a bore in the atomiser head coaxial with the bore of said pistonsleeve is fitted a tube having one end providing a discharge orifice, said tube accommodating a nozzle, the other end of said tube extending into the bore of said piston-sleeve and carrying a piston on which the sleeve is slidable, and a nonreturn or check valve within the tube, and further characterised in that the nozzle presents a fine bore with a port opening into an annular space between the nozzle and the tube, so that by discharge of air from the port a vacuum is set up in the annular space and liquid in the container is sucked through a suction tube, mixes with the air and is ejected in atomised'form through the orifice.

In order to fix the tube in the bore of the head there is provided a pierced and threaded nipple in which the suction tube for the liquid is fitted.

The piston-sleeve presents an annular groove in which a resilient circular ring is located in order to hold the piston-sleeve and the piston against the effort of the spring urging the piston-sleeve in the direction away from the atomiser head.

The invention is clearly illustrated in the ac- 1 Claim. (01. seass secured and the non-return or check valve 9 fitted.

The pressure space is formed by the piston sleeve 1. The compressed air is produced by pressing on the piston sleeve l and at the same time closing the opening H. The piston sleeve 1 now moves in telescopic fashion into the headpiece 2, and, as the piston 8 is fixed, the pressure space I8 is continuously diminished and thus the air in the pressure space I8 is compressed; the non-return Valve 9 opens and the compressed air flows through the bore 6 to the nozzle 4. This nozzle has a smaller bore I5 whereby the air speed is increased. By the emergence of the air from the opening l3 a vacuum is set up in the annular space 7 14, whereby the liquid in the container I is sucked through the suction tube 5, mixes with the outfiowing air, and is ejected in atomised form through the opening l2.

When the piston sleeve 1 has accomplished its maximum stroke, the pressure thereon is to be withdrawn, and the opening I! uncovered. At the moment when there is a balance of pressure between the compressed air space l8 and the atmosphere the non-return valve'9 closes, whereby penetration of the liquid into the compressed air space is prevented. When pressing on the piston sleeve 1 the spring Ill is stressed. The latter now presses the piston sleeve back to its initial position, and by the resulting vacuum in the compressed air space fresh air is sucked through the opening ll.

By the present invention it is rendered possible to construct the head-piece 2 also as a guide for the piston sleeve 1. This simplifies the manufacture of this product. The head-piece 2 may be produced from cast metal or artificial resin moulding material.

It will be noted that the head-piece is formed with a tubular shell in which fits the shell of the piston sleeve; that the piston rod is secured by a tubular screw 6; that the suction tube is fitted to companying drawing in which the single figure is r a longitudinal sectional iew of the preferred embodiment of the invention as applied to a container, the latter being shown in dotted lines.

Applied ot a container l is a head-piece 2 which serves for the reception of the atomising device and is a. guide for the piston sleeve I. The tubular member 3 has a bore it into which is fitted the nozzle 4. One end of this member is fixed in the head-piece 2 and has an opening l2 through which the atomised mixture emerges. At the other end of the member 3, which communicates with the compressed air space l8, the piston 8 is the tubular screw, and that a circlip ll prevents the piston sleeve from being withdrawn too far.

What I claimis:

In an atomiser head adapted to be applied to a liquid container, the combination of a body hav-- ing a pair of cylindrical cavities, the longitudinal axes of which are disposed normal to one another said body having a pair of cylindrical intercommunicating bores coaxial with said axes, respectively; a tubular member disposed in one of said bores and projecting into the cavity which is coaxial with the bore in which said member is disposed; a piston mounted on the end of said memher which projects into said cavity; a pressuresleeveslidably mounted on said piston, having an end Wall extending outwardly of said body and provided with a vent hole; a spring biasing said sleeve from said piston; a split ring so removably mounted in said sleeve as to limit movement of said sleeve relative to said piston; a check-valve in that end of said member on which said piston is mounted, adapted to permit flow of air from said sleeve to said member and prevent reverse flow of air; and means to evacuate liquid from the container to which said head is applied, through the other cavity, the other bore, and the other end of said member, by suction produced by said flow of air admitted from said sleeve to said member.

SAMUEL GIMELLI.

REFERENCES CITED The following references are of record in the file of this patent:

Number Number 4 UNITED STATES PATENTS Name Date De Vilbiss Sept. 15, 1908 Lemoine Feb. 24, 1931 Mehrman et a1 May 25, 1937 Wilson Mar, 10, 1942 FOREIGN PATENTS Country Date France Mar. 10, 1930 France July 29, 1912 France Sept. 23, 1925 France Dec. 11, 1928 France Nov. 18, 1933 

